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emmasim [6.3K]
2 years ago
12

Which type of organisms make up the base of every food chain?

Biology
1 answer:
lord [1]2 years ago
3 0
The answer is Primary producers.

This is a sample of a food chain:

Quaternary Consumer > Tertiary Consumer > Secondary Consumer > Primary Consumer > Primary Producer (base)

Hope this helps.
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one gene in a population of snails determines whether they are poisonous. being poisonous (P) is dominant over not being poisono
Harlamova29_29 [7]

Answer:

F (pp) = 0.04

F (Pp) = 0.32

F (PP) = 0.64

Explanation:

Studying population genetics, we used the Hardy-Weinberg equilibrium model. In the case of snails, the H-W principle predicts that the total number of cases in the population should follow the following equation: PP + 2.Pp + pp = 200.

If a population has 200 snails and 8 are affected by a recessive condition, we have 4% affected, or 0.04.

This means that 0.04 corresponds to p², and p corresponds to 0.2.

Therefore, P is equal to 0.8 because p + P = 1.

Knowing the allele frequencies, we go to the frequency of the genotypes.

F (pp) = p² = 0.04 = 8 snails

F (Pp) = 2.Pp = 0.32 = 64 snails

F (PP) = P² = 0.64 = 128 snails

7 0
3 years ago
Urban sprawl covers land once used for food production and destroys ecosystems.
wlad13 [49]
It is true that Urban sprawl covers land once used for food production and destroys ecosystems. Many of the large cities that have come up were once fertile lands for irrigation or were big jungles. These jungles were cut down or the fertile lands destroyed to build cities and industries.
By the United States Census Bureau standards, a population of 1000 people define an urban area is completely false statement. As per the United States Census Bureau, more than 50000 people define an urban area.


4 0
3 years ago
The magnification of the signal from a water-soluble hormone is achieved through an increase in _______.
gogolik [260]

cAMP in the cytoplasm

Many cAMP can be generated as a second messenger to amplify the signal in response to hormone binding.

7 0
3 years ago
Read 2 more answers
Meals provided by congregate or home-delivered meal programs are designed to provide ______ of the RDA or AI for nutrients.
Delicious77 [7]

Answer:

One - third.

Explanation:

The children and adults must be protected from the malnutrition and each individual has the right to attain the minimum nutrient requirement. Different programs run in U.S.A. to fulfill the nutrient deficiency.

RDA (Recommended Dietary Allowance) is a type of allowance given to the individual for the average daily intake to meet the nutrient requirement. Adequate Intake (AI) is provided when the individual do not have proper proves to develop RDA. The home delivered meals provide atleast one-third of the RDA.

Thus, the answer is one-third.

8 0
3 years ago
All of the following are types of symbiotic relationships except for
rodikova [14]
A. competitive exclusion. 
Parasitism, Commensalism, and Mutualism are all types of symbiotic relationships.
3 0
3 years ago
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